The next step is to download and install the AJAX libraries from Microsoft, available at no charge at http://AJAX.asp.net/downloads.
Installs the framework for developing and running AJAX-enabled web applications, including the libraries that automatically get loaded to the client to perform the AJAX magic. This must be installed prior to installing either of the other two parts required for AJAX.
The AJAX Extensions setup program will configure VWD or Visual Studio to include the ASP.NET AJAX project templates, fully integrating AJAX into your ASP.NET development environment.
An ever-expanding shared-source collection of samples and components, provided by both Microsoft and the ASP.NET community, that make it easy to add client-side functionality to your ASP.NET web site. Our experience is that the Toolkit is incredibly valuable, as demonstrated in Chapter 3. Don't be put off by the fact that it is open source; this is solid code and truly worthwhile.
The included SDK simplifies the creation of your own AJAX controls and extenders and provides a wealth of examples of how to build world-class AJAX controls.
CTPs contain newly evolving features and components that extend the core ASP.NET AJAX 1.0 platform, released by Microsoft every few months. There may be useful features in the latest CTP, but this is prerelease software, so you may want to be cautious ...